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-rw-r--r--libc/unistd/daemon.c39
1 files changed, 26 insertions, 13 deletions
diff --git a/libc/unistd/daemon.c b/libc/unistd/daemon.c
index 5bd6f39ed..19332cca1 100644
--- a/libc/unistd/daemon.c
+++ b/libc/unistd/daemon.c
@@ -56,27 +56,40 @@
/* libc_hidden_proto(chdir) */
/* libc_hidden_proto(fork) */
+#ifndef __ARCH_USE_MMU__
+#include <sys/syscall.h>
+/* use clone() to get fork() like behavior here -- we just want to disassociate
+ * from the controlling terminal
+ */
+static inline pid_t fork_parent(void)
+{
+ register unsigned long ret = INTERNAL_SYSCALL(clone, wtf, 2, CLONE_VM, 0);
+ if (ret != -1 && ret != 0)
+ /* parent needs to die now w/out touching stack */
+ INTERNAL_SYSCALL(exit, wtf, 0);
+ return ret;
+}
+#else
+static inline pid_t fork_parent(void)
+{
+ switch (fork()) {
+ case -1: return -1;
+ case 0: return 0;
+ default: _exit(0);
+ }
+}
+#endif
+
int daemon( int nochdir, int noclose )
{
int fd;
- switch (fork()) {
- case -1:
- return(-1);
- case 0:
- break;
- default:
- _exit(0);
- }
+ if (fork_parent() == -1)
+ return -1;
if (setsid() == -1)
return(-1);
- /* Make certain we are not a session leader, or else we
- * might reacquire a controlling terminal */
- if (fork())
- _exit(0);
-
if (!nochdir)
chdir("/");